Journal
ADVANCES IN ANATOMIC PATHOLOGY
Volume 28, Issue 2, Pages 81-93Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/PAP.0000000000000291
Keywords
molecular alterations; molecular pathology; salivary gland neoplasms; translocations; mutations; genetic aberrations; immunohistochemistry; pathways
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Salivary gland neoplasms are a rare and heterogeneous group of tumors with diverse molecular characteristics. Recent advancements in molecular pathology have provided insights into the genetic aberrations and potential diagnostic, prognostic, and predictive biomarkers in these tumors.
Salivary gland neoplasms are an uncommon and widely heterogeneous group of tumors. In recent years, there has been considerable progress in efforts to reveal the molecular landscape of these tumors, although it is still limited and appears to be only the tip of the iceberg. Genomic aberrations, especially specific chromosomal rearrangements including CRTC1-MAML2 and CRTC3-MAML2 in mucoepidermoid carcinoma, MYB-NFIB and MYBL1-NFIB fusions in adenoid cystic carcinoma, PLAG1 and HMGA2 alterations in pleomorphic adenoma and carcinoma ex pleomorphic adenoma, ETV6-NTRK3 and ETV6-RET in secretory carcinoma, EWSR1-ATF1 and EWSR1-CREM in clear cell carcinoma, provide new insights into the molecular pathogenesis of various salivary gland neoplasms and help to better classify them. These genetic aberrations primarily serve as diagnostic tools in salivary gland tumor diagnosis; however, some also have promise as prognostic or predictive biomarkers. This review summarizes the latest developments in molecular pathology of salivary gland tumors with a focus on distinctive molecular characteristics.
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